Tube manufacturing and mechanical properties of oxide dispersion strengthened ferritic steel

Ukai, Shigeharu; Harada, Masayuki; Okada, Hideya; Inoue, Masakí; Nomura, Shigeo; Shikakura, S.; Nishida, Takahiro; Fujiwara, Masayuki; Asabe, Kazutaka

doi:10.1016/0022-3115(93)90201-9

Cited by 127 publications

(65 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2,3 In addition, the presence of the fine dispersions combined with a very coarse-grained microstructure that is stable over long exposure times leads to excellent creep resistance up to higher temperatures than those that can be achieved with conventional wrought or cast alloys. 4,5 The ODS alloys commercially produced at the end of the 20 th century and the beginning of the 21 st century are represented by MA 956 or MA 957 6 , PM 2000 or PM 2010 6 , ODM alloys 7 and 1DK or 1DS 8 with a ferritic matrix by ODS Eurofer steels with a tempered ferriticmartensitic matrix 9 and by austenitic Ni-ODS PM 1000 or Ni-ODS PM 3030. 10 ODS alloys are produced by high-energy milling of powder mixtures consisting of the alloying elements, master alloys and the oxide dispersion.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of new ODS alloys under single and multiple deformation

Mašek¹,

Khalaj²,

Nový³

et al. 2016

Mater. Tehnol.

View full text Add to dashboard Cite

The application of innovative processing techniques to conventional raw materials can lead to new structural materials with specific mechanical and physical properties, which open up new possibilities of use in some areas of industry. The processing is enabled by powder metallurgy, which utilizes powders consisting of a metal matrix with dispersed stable particles achieved by mechanical alloying and their hot consolidation by rolling. New oxide dispersion strengthened (ODS) Fe-Al-based alloys are tested under different single and multiple thermomechanical treatments at different temperatures. The results show that new ODS alloys are significantly affected by the thermo-mechanical treatment, leading to microstructural changes. Their analysis is performed using different analytical methods such as optical microscopy, scanning electron microscopy and X-ray diffraction analysis. Keywords: ODS alloys, composite, steel, Fe-Al Uporaba inovativnih tehnik preoblikovanja na obi~ajnih materialih lahko privede do novih konstrukcijskih materialov s specifi~nimi mehanskimi in fizikalnimi lastnostmi, ki odpirajo nove mo`nosti uporabe v industriji. Metalurgija prahov omogo~a uporabo prahov s kovinsko osnovo z dispergiranimi stabilnimi delci, ki jih dobimo pri mehanskem legiranju in vro~i konsolidaciji z valjanjem. Nove zlitine Fe-Al, disperzijsko utrjene z oksidi (ODS), so bile preizku{ene pri razli~ni, eno-ali ve~stopenjski obdelavi pri razli~nih temperaturah. Rezultati ka`ejo, da ima termomehanska obdelava novih ODS zlitin mo~an vpliv, ki se vidi v spremembah mikrostrukture. Analiza je bila izvedena s pomo~jo razli~nih analitskih metod, kot so: svetlobna mikroskopija, vrsti~na elektronska mikroskopija in rentgenska difrakcijska analiza.

show abstract

Section: Introductionmentioning

confidence: 99%

Behaviour of new ODS alloys under single and multiple deformation

Mašek¹,

Khalaj²,

Nový³

et al. 2016

Mater. Tehnol.

View full text Add to dashboard Cite

show abstract

“…The previous studies on ODS ferritic steel development [1][2][3][4][5] clearly demonstrated the need for a technological breakthrough in the application of ODS ferritic steels to cladding materials of the fuel pins. The first challenge is development of manufacturing technology for thin-walled ODS ferritic steel claddings by means of cold-rolling process.…”

Section: Introductionmentioning

confidence: 99%

Characterization of High Temperature Creep Properties in Recrystallized 12Cr-ODS Ferritic Steel Claddings

Ukai¹,

Okuda

Fujiwara

et al. 2002

Journal of Nuclear Science and Technology

152

View full text Add to dashboard Cite

The high temperature strengthening mechanism of previously manufactured 12Cr-ODS ferritic steel claddings was clarified. In the recrystallized 12Cr-2W-0.3Ti-0.24Y 2 O 3 -ODS ferritic steel cladding, αY 2 TiO 5 type complex oxide formation was responsible for the drastic reduction of oxide particle size and the resulting shortened distance between particles, which led to superior internal creep rupture strength at 973 K because of the high resistance to gliding dislocation. Internal creep deformation was considered to be controlled by the grain boundary sliding associated with grain morphology: the near 11, 9 and 19 coincidence boundaries with a 110 common axis.

show abstract

“…This structure caused the degraded creep strength and poor ductility in the circumferential direction of the cladding, reported in Ref. (2).…”

Section: Characteristics Of Ods Martensitic Steelsmentioning

confidence: 87%

Development of Oxide Dispersion Strengthened Steels for FBR Core Application, (II) Morphology Improvement by Martensite Transformation.

Ukai

Nishida

Okuda

et al. 1998

J. Nucl. Sci. Technol.

View full text Add to dashboard Cite

Previously manufactured oxide dispersion strengthened (ODS) ferritic steel cladding tubes had inferior internal creep rupture strength in the circumferential hoop direction. This unexpected feature of ODS cladding tubes was substantially ascribed to the needle-like grain structure aligned with the forming direction. In this study, the grain morphology was controlled by using the martensite transformation in ODS martensitic steels to produce an equi-axial grain structure. A major improvement in the strength anisotropy was successfully achieved. The most effective yttria addition was about lmass% in improving the strength of the ODS martensitic steels. A simple addition of titanium was particularly effective in increasing the strength level of the ODS martensitic steels to that of ODS ferritic steels.

show abstract

Tube manufacturing and mechanical properties of oxide dispersion strengthened ferritic steel

Cited by 127 publications

References 3 publications

Behaviour of new ODS alloys under single and multiple deformation

Behaviour of new ODS alloys under single and multiple deformation

Characterization of High Temperature Creep Properties in Recrystallized 12Cr-ODS Ferritic Steel Claddings

Development of Oxide Dispersion Strengthened Steels for FBR Core Application, (II) Morphology Improvement by Martensite Transformation.

Contact Info

Product

Resources

About